Warp stop-motion



C. M. STONE.

WARP STOP MOTION.

APPLICATIQN man FEB. l9. I920.

Patented Sept. 14, 1920.

2 SHEETS-SHEET l.

C. M. STONE.

WARP STOP MOTION.

APPLICATION FILED r55. 19, 1920.

1,352,558. PatentedSept. 14,1920.

2 SHEETSSHEET 2- UNITED STATES PATENT OFFICE.

CHARLES M. STONE, OF LEVISTON. MAINE, ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

WARP STOP-MOTION.

Specification of Letters Patent.

Patented Sept. 14, 1920.

Application filed February 19, 1920. Serial No. 359,857.

To all whom it may concern:

lie it known that 1, CHARLES M. STONE, a citizen of the United States, residing at Lewiston, in the county of Androscoggin and State of Maine, have invented a new and useful .Varp Stop-Motion, of which the following is a specification.

This invention relates to a warp stop motion of the shifting center type in which a certain part of the mechanism operates in an abnormal manner when normal movement of other parts is prevented by a fallen drop wire.

It is the object of my invention to improve the construction of warp stop mechanism of this type, simplifying the parts and increasing the efliciency thereof.

With this general object in View, an important feature of my invention relates to the provision of yielding gravity-controlled connections between the actuating mechanism and the loom stopping mechanism, whereby the latter mechanism is maintained normally inoperative.

Further features of my invention relate to arrangements and combinations of parts which wi ll be hereinafter described and more particularly pointed out in the appended claims. A preferred form of my invention is shown in the drawings, in which- Figure 1 is a front elevaton of my improved mechanism;

Fig. 2 is a side elevation of the parts shown in Fig. 1;

Figs. 3 and 4 are diagrammatic side elevations illustrating the operation of the device under difl'erent conditions, and

Figs. 5 and 6 show two relative positions of the drop wire and indicator bar.

I have shown my invention as embodied n a stop motion of the general type shown in the patent to Regan, No. 1,265,112, issued May 7, 1918. In this type of stop motion, the drop wires W (Fig. 5) are provided with openings in which indicating bars 10 are angularly movable when the drop wires are in normal raised position. At their upper ends the openings are contracted to closely engage an indicating bar when a broken warp thread allows a wire W to fall, as shown in Fig. 6.

Commonly the drop wires are arranged in two or more banks, for each of which an indicating bar 10 is provided. These bars are mounted in bearing blocks for member 19 connected by a link 20 to lcgl'r larly operated actuating mechanism not shown. The member 19 is angular-1y movable about a bearing stud 21 fixed to the frame 11.

The actuator 16 has an upwardly extending arm 22 having an opening in its upper end to receive an angle rod 23 to which a weight 24 is adjustably secured. The horizontal portion of the rod 23 also affords a bearing for one end of a connection 25 through which loom stopping mechanism (not shown) is controlled.

A lug 26 on the hub ofthe member 19 forms a stop for the arm 22 of the actuator, and the weight 24 normally holds the arm in yielding contact with the lug 26. When in this position, the opening in the end of the arm 22 is alined with the stud 21, so that angular movement of the actuator 16 about the axis of the stud 21 imparts no movement to the connection 25.

A cover plate 27 is pivoted on the frame 11 and prevents axial movement of the rods 10 or their bearing blocks when the plate is in normal position.

The normal or usual operation of the mechanism is indicated in Fig. 3, in which the parts move from the position shown in *full lines to the dotted line positions as the number 19 is oscillated by its driving mechanism. As all the drop wires W are raised, the rods 10 are free to move angularly when the actuator 16 is moved. about the axis of the stud 21 from its vertical position to the position shown in dotted lines in Fig. 3, swinging the arms 13 with it. The portion 22 of the actuator '16 is held against the lug 26 by the weight 24 and no movement of the connection 25 occurs.

\Vhen, however, a fallen drop wire engages one of the rods 10, as indicated in Fig. 6, the arms 13 become fixed in position, and the actuator 16 thereafter moves about the studs let as a joint center, such movement carrying the upper end of the arm 22 to the right and drawing the connection 25 up ward and to the right, thus rendering the loom stopping mechanism operative. During this movement, the arm 22 moves away from the lug 26 and raises the Weight 24 in so doing. As soon as the fallen drop wire is raised, the weight restores the parts to normal working position. lfhe resistance of the weight to movement from normal position may be varied as desired by adjusting the weight along the rod 28.

Having described my invention and the operation thereof, it will be evident that l have provided a stop motion of the shifting center type in which a minimum number of parts are used and in which all springs are omitted. All parts are simple and easily made, and the operation is reliable under all conditions.

It will be also evident that changes and modifications can be made in my invention. by those skilled in the art without departing from the spirit and scope thereof, as set forth in the claims, and I do not wish to be otherwise limited to the details of construction herein disclosed, but What I do claim is 1. A warp stop motion comprising a frame, a plurality of drop wires, angularly movable indicating bars associated therewith and supported in said frame, an actuator for said bars, a member on which said actuator is pivoted, means to oscillate said member regularly, a stop for said actuator, a weight normally holding said actuator against said stop, and a connection from said actuator through which the loom Will be stopped on I free movement of said actuator.

2. A warp stop motion comprising a frame, a plurality of drop Wires, angularly movable indicating bars associated therewith and supported in said frame, an actuator for said bars, a pivoted member having a depending arm on which said actuator is pivoted intermediate its ends, means to regularly oscillate said member, a connection from the upper end of said actuator through which the loom may be stopped, a stop normally positioning the upper end of said actuator in alinement with the pivot of said member. and weight normally effective to hold said actuator yieldingly against said stop. 7

3. A warp stop motion comprising a frame, a plurality of drop wires, angularly movable indicating bars associated therewith and supported in said frame, said bars being positioned for holding engagement by said wires effective to pre ent further angular movement thereof. an actuator for said bars, and driving mechanism for said actuator eliective to give said actuator a yielding abnormal movement in one direction only when normal angular movement of said bars and actuator is prevented by a fallen drop wire.

In testimony whereof I have hereunto aflixed my signature.

CHARLES M. STONE. 

